Tracing chart



Nov. 8, 1932. c. LoRBr-:R 1,887,163

TRACING CHART Filed Feb. 5, 1932 Zf 4 1m Zz-/efzfor f har/ey [0766erorney Patented Nov. 8, 1932 UNITED STATES PATENT OFFICE.

CHARLES LORBEB, F LOUISVILLE, KENTUCKY TRACING CHART Application tiledFebruary 3,11932. Serial No. 590,758.

This invention relates to educational de- Figure 2 is an enlargedsection on the line vices and has special reference to a tracing 2-2 ofFigure 1. chart. Figure 3 is a detail. view of one of the Thisapplication is a continuation in part clips used with this form of theinvention.

5 of my copending application for tracing chart Figure 4 is a viewsimilar to Figure 1 but 55 filed August 12, 1931 and bearing the Serialshowing a second form of the invention. Number 556,689. Figure 5 is aview similar to Figure 1 but One important object of the invention isshowing a third form of the invention. to improve and simplify thetracing chart Figure 6 is an enlarged detail section on arrangementsshown in my copending apthe line 6-6 of Figure 5. 60 plication aforesaidand also in my copend- Figure 7 is a longitudinal section through ingapplication filed December 22, 1931 and a portion of a fourth form ofthe invention. bearing the Serial Number 582,625 for trac- In each formof the invention as herein ing charts. disclosed the tracing chart isshown as con- A second important object of this invention sisting of arectangular sheet 1() which may 65 is to provide an improved arrangementof be made of metal, cardboard, Celluloid or any tracing chart whereinthe means for `securother suitable material. In the forms shown ing asheet of tracing paper on the chart in Figures 1 and 4 the matter to betraced will be of extremely simple character. is shown as consisting ofillustrations of nat- A third important object of the invention uralobjects impressed in the sheet by in- 70 is to provide an improved formof tracing taglio lines 11 which thus form grooves for chart wherein thematter to be traced will guiding a tracing implement such as a penbe ofsuch contrasting color to the background cil or the like. The groovesthus formed arc or that it Will be plainly visible through thepreferably colored in contrast to the body or 0 tracing paper.background of the sheet so that they may 75 A fourth important object ofthe invention readily be observed through a tracinflr sheet is toprovide and improve tracing chart hav- 12 of the same size and shape asthe sheet 10 ing the matter to be traced stamped in inbut madepreferably of thin transparent taglio to present grooves to guide apencil paper. or other tracing implement, the grooves be- In the formshown in Figure 6 the matter 80 Y ing in a color contrasting with thebackto be traced is illustrated at 13 asy being ground so that they maybe readily seen and simply shown on a flat sheet in contrasting followedby a young child. color to the background. For instance, the It is to beunderstood that the word color matter may be simply printed,lithographed as herein used is to be construed as broad or otherwiseshown on the chart. The tracenough to include black and White as welling sheet 12 is also provided for this form. as all tints, shades andhues. In the form shown at Figure 1 the trac- With the above and otherobjects in view ing paper is held on the sheet by means of as will behereinafter apparent, the invenspring clips each having an eye 14 fromtion consists in general of certain novel dewhich extends a pair ofparallel legs 15 ter- 90 tails of construction and combinations ofminating in ends 16 flaringly disposed with parts hereinafter fullydescribed, illustrated respect to each other. These clips may either inthe accompanying drawing and specifically be short as shown at the rightof Figure 1 claimed. or may be long enough to extend the full In theaccompanying drawing like charac- Width of the sheet and chart as shownat the ters of reference indicate like parts in the left of Figure 1.several views, and In the form shown at Figure 4 the tracing Figure 1 isa front view of one form of the paper is held to the chart by one of thecominvention, a portion of the tracing paper bemon forms of paper clipsas shown at 17 and 50 ing removed to better show the chart. two of theseclips may be used as there shown 100 or there ma be four clips used inwhich case it is desira le to have the clips located at the respectivecorners of the chart.

In the form shown in Fi re 5 the tracing paper is held to the chart i;the usual twopronged paper fasteners 18, the chart being provided withunched openings 19 to permit such paper asteners being used. In thiscase, also two or four fasteners ma be used.

In the form shown in Figure 7 t e tracing sheet is lapped around theedge of the chart as at 2O and held by any type of paper clip as at 21.

It is preferred to provide the charts in sets with the matter to betraced bein of relatively simple character on the first c art of the setand progressively increasing in complexity in the successive charts ofthe set. Thus, the student begins with comparatively easy Work andprogresses to more and more diflicult work.

Of course, with each set of charts there will be provided a quantity ofcorrespondingly sized tracing sheets.

There has thus been provided a simple and efficient device of the kinddescribed and for the purpose specified.

It is obvious that minor changes may be made in the form andconstruction of the i11- vention Without departing from the materialspirit thereof. It is not, therefore, desired to confine the inventionto the exact form herein shown and described, but it is desired toinclude all such as properly come Within the scope claimed.

Having thus described the invention, what is claimed as new, is:

l. A tracing cha-rt having colored grooves formed in its surfaceindicating matter to be traced and adapted to receive the oint of atracing implement, the color of said grooves being distinct from thecolor of the surface in which they are formed.

2. A tracing chart having colored grooves formed in its surfaceindicating matter to be traced and adapted to receive the point of atracing implement, the color of said grooves being distinct from thecolor` of the surface in which they are formed, in combination with atracing sheet of thin transparent paper adapted to be forced into saidgrooves by the tracing implement.

3. A tracing chart having colored grooves formed in its surfaceindicating matter to be traced and adapted to `receive the point of atracing implement, the color of said grooves being distinct from thecolor of the surface in which they are formed, in combination With atracing sheet of thin transparent paper adapted to be forced into saidgrooves by the tracing implement, and means for holding said sheet fiaton said chart.

In testimony whereof I ailix my signature.

CHARLES LORBER.

